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Impact of soybean seeding rate on weed control

Impact of soybean seeding rate on weed control

Can soybean seeding rates be used as part of an integrated herbicide resistance management program? That's the question in a study published in Weed Science. Researchers conducted studies in 2012 and 2013 to determine the most effective seeding rates when used with or without pre-emergence herbicides.

With the reduced seeding rate, fields had fewer soybean plants and a slower-to-develop crop canopy, providing weeds a greater opportunity to establish and thrive in the field. Canopy development, an important component of integrated weed management, relies on the growth of the crop to curb the establishment and growth of weeds.

The results of the study demonstrated that a lower seeding rate achieved beneficial crop yields and economic returns when combined with a PRE herbicide. The use of broad spectrum PRE herbicides reduced total weed density and biomass by 93% and 95%, respectively, in the two years of the study.

With the current increase in seed costs and the potential for this in the future, producers can offset this cost with proper seeding rates used in conjunction with a PRE herbicide. This will also help reduce the likelihood of herbicide resistant weeds because the total number of weeds exposed to POST herbicides will be greatly reduced.

Read the full article from Weed Science.

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